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An illustration of a house cricket larva. Acheta domesticus (house cricket) is a cricket native to Europe. Both sexes of this grey or brown cricket are fully winged but can't fly. Originally from the Middle East and North Africa the insect is found in permanently heated buildings such as bakeries. Its shrill warbling song is heard mainly at night.

House Cricket Larva

An illustration of a house cricket larva. Acheta domesticus (house cricket) is a cricket native to Europe.…

An illustration of a house cricket pupa. Acheta domesticus (house cricket) is a cricket native to Europe. Both sexes of this grey or brown cricket are fully winged but can't fly. Originally from the Middle East and North Africa the insect is found in permanently heated buildings such as bakeries. Its shrill warbling song is heard mainly at night.

House Cricket Pupa

An illustration of a house cricket pupa. Acheta domesticus (house cricket) is a cricket native to Europe.…

Acheta domesticus (house cricket) is a cricket native to Europe. Both sexes of this grey or brown cricket are fully winged but can't fly. Originally from the Middle East and North Africa the insect is found in permanently heated buildings such as bakeries. Its shrill warbling song is heard mainly at night.

House Cricket

Acheta domesticus (house cricket) is a cricket native to Europe. Both sexes of this grey or brown cricket…

An illustration of a dragon fly (right) and a nymph (left). A dragonfly is a type of insect belonging to the order Odonata, the suborder Epiprocta or, in the strict sense, the infraorder Anisoptera. It is characterized by large multifaceted eyes, two pairs of strong transparent wings, and an elongated body. Dragonflies are similar to damselflies, but the adults can be differentiated by the fact that the wings of most dragonflies are held away from, and perpendicular to, the body when at rest. n biology, a nymph is the immature form of some insects, which undergoes incomplete metamorphosis (hemimetabolism) before reaching its adult stage; unlike a typical larva, a nymph's overall form already resembles that of the adult. In addition, while a nymph moults it never enters a pupal stage. Instead, the final moult results in an adult insect.

Dragon Fly and Nymph

An illustration of a dragon fly (right) and a nymph (left). A dragonfly is a type of insect belonging…

An illustration of an earwig larva. Earwigs is the common name given to the insect order Dermaptera characterized by membranous wings folded underneath short leathery forewings (hence the literal name of the order—"skin wings"). The abdomen extends well beyond the wings, and frequently, though not always, ends in a pair of forceps-like structures termed cerci. The order is relatively small among Insecta, with about 1,800 recorded species in 10 families. Earwigs are, however, quite common globally. There is no evidence that they transmit disease or otherwise harm humans or other animals, despite their nickname pincher bug.

Earwig Larva

An illustration of an earwig larva. Earwigs is the common name given to the insect order Dermaptera…

An illustration of an earwig pupa. Earwigs is the common name given to the insect order Dermaptera characterized by membranous wings folded underneath short leathery forewings (hence the literal name of the order—"skin wings"). The abdomen extends well beyond the wings, and frequently, though not always, ends in a pair of forceps-like structures termed cerci. The order is relatively small among Insecta, with about 1,800 recorded species in 10 families. Earwigs are, however, quite common globally. There is no evidence that they transmit disease or otherwise harm humans or other animals, despite their nickname pincher bug.

Earwig Pupa

An illustration of an earwig pupa. Earwigs is the common name given to the insect order Dermaptera characterized…

Earwigs is the common name given to the insect order Dermaptera characterized by membranous wings folded underneath short leathery forewings (hence the literal name of the order—"skin wings"). The abdomen extends well beyond the wings, and frequently, though not always, ends in a pair of forceps-like structures termed cerci. The order is relatively small among Insecta, with about 1,800 recorded species in 10 families. Earwigs are, however, quite common globally. There is no evidence that they transmit disease or otherwise harm humans or other animals, despite their nickname pincher bug.

Earwig

Earwigs is the common name given to the insect order Dermaptera characterized by membranous wings folded…

Part of a tracheal stem and branches of an insect. Labels: Z, cellular outer wall; SP, cuticular inner wall with spiral fiber.

Tracheal Stem and Branches

Part of a tracheal stem and branches of an insect. Labels: Z, cellular outer wall; SP, cuticular inner…

Tracheal system of a fly larva. Labels: Tr, longitudinal stem of right side; St', St", anterior and posterior stigmata.

Tracheal System of Fly Larva

Tracheal system of a fly larva. Labels: Tr, longitudinal stem of right side; St', St", anterior and…

Lateral view of a grasshopper. Labels: St, stigmata; T, tympanal organ

Grasshopper

Lateral view of a grasshopper. Labels: St, stigmata; T, tympanal organ

Nervous system of the larva of a ladybug. Labels: Gfr, frontal ganglion; G, cerebral ganglia; Sg, subcesophageal ganglion; G'-G", ganglia of the ventral chain.

Nervous System of a Ladybug Larva

Nervous system of the larva of a ladybug. Labels: Gfr, frontal ganglion; G, cerebral ganglia; Sg, subcesophageal…

Nervous system of an adult ladybug. Ag, optic ganglion.

Nervous System of a Ladybug

Nervous system of an adult ladybug. Ag, optic ganglion.

The winged female woolly aphid (Schizoneura lanigera), a species of plant lice of the Eriostoma family.

Adult Woolly Aphid

The winged female woolly aphid (Schizoneura lanigera), a species of plant lice of the Eriostoma family.

The female woolly aphid larva (Schizoneura lanigera), a species of plant lice of the Eriostoma family.

Woolly Aphid Larva

The female woolly aphid larva (Schizoneura lanigera), a species of plant lice of the Eriostoma family.

The securifera or saws of the sawfly (Lophyrus suffusus), an insect related to the wasps and bees.

Securifera

The securifera or saws of the sawfly (Lophyrus suffusus), an insect related to the wasps and bees.

An illustrative look on the life cycle of a gnat. A,larva; b, pupa; c, perfect insect emerging; d,male; and e, female gnat.

Life Cycle of a Gnat

An illustrative look on the life cycle of a gnat. A,larva; b, pupa; c, perfect insect emerging; d,male;…

Grasshoppers are insects of the suborder Caelifera in the order Orthoptera. To distinguish them from bush crickets or katydids, they are sometimes referred to as short-horned grasshoppers. Species that change color and behaviour at high population densities are called locusts.

Female Grasshopper

Grasshoppers are insects of the suborder Caelifera in the order Orthoptera. To distinguish them from…

An illustration of a female hop aphid. Aphids, also known as plant lice (and in Britain as greenflies), are small plant-eating insects, and members of the superfamily Aphidoidea. Aphids are among the most destructive insect pests on Earth.

Hop Aphid (Female)

An illustration of a female hop aphid. Aphids, also known as plant lice (and in Britain as greenflies),…

An illustration a hop aphid in larval form. Aphids, also known as plant lice (and in Britain as greenflies), are small plant-eating insects, and members of the superfamily Aphidoidea. Aphids are among the most destructive insect pests on Earth.

Hop Aphid (Larva)

An illustration a hop aphid in larval form. Aphids, also known as plant lice (and in Britain as greenflies),…

"Semiotellus chalcidiphagus. a, female, from side." -Whitney, 1911

Wasp

"Semiotellus chalcidiphagus. a, female, from side." -Whitney, 1911

"Semiotellus chalcidiphagus. a, male, from above." -Whitney, 1911

Wasp

"Semiotellus chalcidiphagus. a, male, from above." -Whitney, 1911

The Common Glowworm (Lampyris noctiluca) is a species of beetle in the Lampyridae family of fireflies.

Common Glowworm

The Common Glowworm (Lampyris noctiluca) is a species of beetle in the Lampyridae family of fireflies.

The adult Sheep Bot Fly (Oestrus ovis) is a fly in the Oestridae family of bot flies and is known as a major pest in the Australian sheep industry.

Sheep Bot Fly

The adult Sheep Bot Fly (Oestrus ovis) is a fly in the Oestridae family of bot flies and is known as…

The adult Sheep Bot Fly (Oestrus ovis) is a fly in the Oestridae family of bot flies and is known as a major pest in the Australian sheep industry.

Sheep Bot Fly

The adult Sheep Bot Fly (Oestrus ovis) is a fly in the Oestridae family of bot flies and is known as…

The enclosed puparium of the Sheep Bot Fly (Oestrus ovis) is a fly in the Oestridae family of bot flies and is known as a major pest in the Australian sheep industry.

Sheep Bot Fly

The enclosed puparium of the Sheep Bot Fly (Oestrus ovis) is a fly in the Oestridae family of bot flies…

The full grown larva of the Sheep Bot Fly (Oestrus ovis) is a fly in the Oestridae family of bot flies and is known as a major pest in the Australian sheep industry. 'a' shows the mouth hooks.

Sheep Bot Fly

The full grown larva of the Sheep Bot Fly (Oestrus ovis) is a fly in the Oestridae family of bot flies…

The full grown larva of the Sheep Bot Fly (Oestrus ovis) is a fly in the Oestridae family of bot flies and is known as a major pest in the Australian sheep industry. 'b' shows anal appendages.

Sheep Bot Fly

The full grown larva of the Sheep Bot Fly (Oestrus ovis) is a fly in the Oestridae family of bot flies…

The young larva of the Sheep Bot Fly (Oestrus ovis) is a fly in the Oestridae family of bot flies and is known as a major pest in the Australian sheep industry. 'b' shows anal appendages.

Sheep Bot Fly

The young larva of the Sheep Bot Fly (Oestrus ovis) is a fly in the Oestridae family of bot flies and…

The Sheep Ked (Melophagus ovinus) is a wingless louse fly that is a parasite to sheep.

Sheep Ked

The Sheep Ked (Melophagus ovinus) is a wingless louse fly that is a parasite to sheep.

The Alderfly (Sialis infumata) is an insect in the Megaloptera order of alderflies, dobsonflies, and fishflies.

Alderfly

The Alderfly (Sialis infumata) is an insect in the Megaloptera order of alderflies, dobsonflies, and…

The larva of Sigalphus curculionis, a species of parasitoid wasps. These insects use other insects as hosts until they are eventually killed.

Parasite Wasp Larva

The larva of Sigalphus curculionis, a species of parasitoid wasps. These insects use other insects as…

The cocoon of Sigalphus curculionis, a species of parasitoid wasps. These insects use other insects as hosts until they are eventually killed.

Parasite Wasp Cocoon

The cocoon of Sigalphus curculionis, a species of parasitoid wasps. These insects use other insects…

The pupa of Sigalphus curculionis, a species of parasitoid wasps. These insects use other insects as hosts until they are eventually killed.

Parasite Wasp Pupa

The pupa of Sigalphus curculionis, a species of parasitoid wasps. These insects use other insects as…

The female adult of Sigalphus curculionis, a species of parasitoid wasps. These insects use other insects as hosts until they are eventually killed.

Female Adult Parasite Wasp

The female adult of Sigalphus curculionis, a species of parasitoid wasps. These insects use other insects…

The male adult of Sigalphus curculionis, a species of parasitoid wasps. These insects use other insects as hosts until they are eventually killed.

Male Adult Parasite Wasp

The male adult of Sigalphus curculionis, a species of parasitoid wasps. These insects use other insects…

Honey bees (or honeybees) are a subset of bees, primarily distinguished by the production and storage of honey and the construction of perennial, colonial nests out of wax. Pictured here is a male honey bee.

Honey Bee (Male)

Honey bees (or honeybees) are a subset of bees, primarily distinguished by the production and storage…

Honey bees (or honeybees) are a subset of bees, primarily distinguished by the production and storage of honey and the construction of perennial, colonial nests out of wax. Pictured here is a queen honey bee.

Honey Bee (Queen)

Honey bees (or honeybees) are a subset of bees, primarily distinguished by the production and storage…

Honey bees (or honeybees) are a subset of bees, primarily distinguished by the production and storage of honey and the construction of perennial, colonial nests out of wax. Pictured here is a worker honey bee.

Honey Bee (Worker)

Honey bees (or honeybees) are a subset of bees, primarily distinguished by the production and storage…

Honey bees (or honeybees) are a subset of bees, primarily distinguished by the production and storage of honey and the construction of perennial, colonial nests out of wax. Pictured here are the various legs of hive bees.

Legs of the Hive Bee

Honey bees (or honeybees) are a subset of bees, primarily distinguished by the production and storage…

Stingless bees, or simply meliponines, are a large group of bees, comprising the tribe Meliponini in the family Apidae, and closely-related to the common honey bees. Pictured here are the various legs of the bees.

Legs of the Stingless Bee

Stingless bees, or simply meliponines, are a large group of bees, comprising the tribe Meliponini in…

A bumblebee (or bumble bee) is any member of the bee genus Bombus, in the family Apidae. Pictured here are the various legs of the bees.

Legs of the Humble Bee

A bumblebee (or bumble bee) is any member of the bee genus Bombus, in the family Apidae. Pictured here…

"Carrion-beetle (Silpha inaequalis). a, larva; d, same; f, g, h, mandible, labium, and maxilla of larva; i, j, anal process and antenna of same; m, one of the lateral processes. b, pupa; e, same; l, anal process of same. c, beetle; k, anterior tarsus of same." -Whitney, 1911

Carrion Beetle

"Carrion-beetle (Silpha inaequalis). a, larva; d, same; f, g, h, mandible, labium, and maxilla of larva;…

The Saw-Toothed Grain Beetle (Oryzaephilus surinamensis) is a beetle of the Silvanidae family and is named after the saw teeth on the sides of its prothorax.

Saw-Toothed Grain Beetle

The Saw-Toothed Grain Beetle (Oryzaephilus surinamensis) is a beetle of the Silvanidae family and is…

The silverfish (Lepisma saccharina) is a small insect of the Lepismatidae family of silverfish and firebrats. It gets its name from the silver scales it develops after its third moult.

Silverfish

The silverfish (Lepisma saccharina) is a small insect of the Lepismatidae family of silverfish and firebrats.…

"Resin-gnat (Diplosis resinicola). a, adult female; b, wing of same; c, cross-section of antenna of female; d, same of male; e, section of pine twig showing work of larvae; f, same showing extruded pupa-cases; a, e, f, enlarged; b, c, d, still more enlarged." -Whitney, 1911

Resin Gnat

"Resin-gnat (Diplosis resinicola). a, adult female; b, wing of same; c, cross-section of antenna…

The moth of the Grapevine Root Borer (Memthyrus polistiformis).

Grapevine Root Borer (Moth)

The moth of the Grapevine Root Borer (Memthyrus polistiformis).

"Root-weevil (Leptops hopei). a, weevil; b, pupa; c, larva, in situ; d, weevil ovipositing on leaf above; e, eggs on opened leaf." -Whitney, 1911

Apple Root Weevil

"Root-weevil (Leptops hopei). a, weevil; b, pupa; c, larva, in situ; d, weevil ovipositing on leaf above;…

"Rose-curculio (Rhynchites bicolor). a, beetle; c, same in profile; b, claw." -Whitney, 1911

Rose Curculio

"Rose-curculio (Rhynchites bicolor). a, beetle; c, same in profile; b, claw." -Whitney, 1911

The American Sawfly (Cimbex Americana) is an insect with an ovipositor resembling a saw blade.

American Sawfly

The American Sawfly (Cimbex Americana) is an insect with an ovipositor resembling a saw blade.

The Larch Sawfly (Pristiphora erichsonii) is an insect resembling a black wasp in the Tenthredinidae family of sawflies.

Larch Sawfly

The Larch Sawfly (Pristiphora erichsonii) is an insect resembling a black wasp in the Tenthredinidae…

"Barnacle-scale, a coccine scale-insect, Ceroplastes cirripediformis, which occurs upon citrus-trees in Florida and somewhat resembles a very small barnacle, whence the popular and the specific names." -Whitney, 1911

Barnacle Scale

"Barnacle-scale, a coccine scale-insect, Ceroplastes cirripediformis, which occurs upon citrus-trees…

Cast-off nymphal skin of bed-bug.

Bedbug

Cast-off nymphal skin of bed-bug.

Passive nymph or "pupa" of male scale insect.

Passive Nymph

Passive nymph or "pupa" of male scale insect.

Bedbug.

Bedbug

Bedbug.

Nymph (4th stage) of cicada.

Nymph of Cicada

Nymph (4th stage) of cicada.

A cicada is an insect of the order Hemiptera, suborder Auchenorrhyncha, in the superfamily Cicadoidea, with large eyes wide apart on the head and usually transparent, well-veined wings.

Head of Cicada

A cicada is an insect of the order Hemiptera, suborder Auchenorrhyncha, in the superfamily Cicadoidea,…

The embryo if an insect, <em>gryllotalpa</em>.

Insect Embryo

The embryo if an insect, gryllotalpa.

Bedbug.

Bedbug

Bedbug.

It is a slow-growing long-lived tree, hard to transplant because of its long taproot, and subject to insect damage.

Shell-Bark Hickory

It is a slow-growing long-lived tree, hard to transplant because of its long taproot, and subject to…

The adult of Dytiscus fasciventris, a species of predacious diving beetles.

Diving Beetle

The adult of Dytiscus fasciventris, a species of predacious diving beetles.